<template>
  <div class="person">
    <h1>情况三：监视【reactive】定义的【对象类型】数据</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年龄：{{ person.age }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年龄</button>
    <button @click="changePerson">修改</button>
  </div>
</template>

<script lang="ts" setup name="Person">
  import { reactive,watch } from 'vue';
  //数据
  let person = reactive({
    name:'张三',
    age:18
  });
  //方法
  function changeName(){
    person.name += '~';
    
  }
  function changeAge() {
    person.age += 1
  }
  function changePerson() {
    //此时person对象的地址值并为修改，只是批量修改了person对象中的属性值
    Object.assign(person,{name:'王五',age:20})
  }
 
  //监视：watch情况三：reactive对象，默认开启深度监视
  watch(person, (newValue,oldValue) => { 
    console.log('person对象被修改了')
    console.log(newValue,oldValue);
})
</script>

<style scoped>
  .person {
    background-color: skyblue;
    box-shadow: 0 0 10px;
    border-radius: 10px;
    padding: 20px;
  }
  button {
    margin: 0 5px;
  }
  li {
    font-size: 20px;
  }
</style>